Question Duplicate class with Android

Hello !
I'm trying to use Firebase Cloud Messaging and an asset from the asset store (UniWebView) for a mobile app. They both need androidx packages when importing and it results in conflicts between the packages.

I tried importing Firebase manually and with the package manager, but nothing changed.

java.lang.RuntimeException: Duplicate class android.support.v4.graphics.drawable.IconCompatParcelizer found in modules classes.jar androidx.core.core-1.0.0 and classes.jar (androidx.core:core:1.1.0).

I'm using Unity 2019.4.10f1

How can I solve those conflicts ?

 

So, I'm experiencing this same issues. In case you didn't know, UniWebView has some specific options for handling duplicate classes:

https://docs.uniwebview.com/guide/f...ng-duplicate-class-when-exporting-for-android

That said, I'm still experiencing issues. Either the device can't load the browser if I set the configuration to not load androidx.browser, or I get duplicate classes if I do.

 

Did you resolve this ever?

 

Firebase is always difficult, mostly because they try to be 100% automatic to install / use, and then they randomly fail in mysteriously-confusing ways.

How to troubleshoot build failures:

First, make a blank project with a single blank scene and prove that it builds successfully.

If the blank project does NOT build, go fix your Unity installation or your other tools, such as Android SDK, NDK, JDK, etc. It may even be necessary to change to a different version of Unity3D. It is generally best to stay with LTS versions of Unity3D.

Until you can build a blank project to the target platform, don't fiddle with anything else.

Once you can build a blank project, now bisect the problem by bringing over parts of your current project and building it one subsystem at a time, perhaps stubbing things out that might trigger compiler errors.

Most often things that prevent building are third-party libraries such as Firebase.

Once you identify the subsystem, go to the documentation for it and make sure you are doing it correctly.

It may also be helpful to work through a tutorial or two for whatever subsystem is making the build fail.

Android build not building:

Recently (circa July 2022) there have been reports of Unity's installer failing to install the Android Tools.

https://forum.unity.com/threads/cant-build-for-android.1306098/

Here was how I brought up Unity2020.3.41 and the Android SDK 31 on October 30, 2022 (edited on August 23, 2023 to include Android SDK 33...):

https://forum.unity.com/threads/aab...y-2021-3-8-with-jdk-1-8.1322211/#post-8551193

Android Gradle errors and other related stuff:

https://forum.unity.com/threads/unity-gradle-bug-please-help.1368018/#post-8625789